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NOTE H - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Unrealized Gain (Loss) on Investments (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Oct. 31, 2013	Apr. 30, 2013
NOTE H - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Unrealized Gain (Loss) on Investments [Line Items]
Fair Value, Less than 12 months	$ 1,910	$ 0
Unrealized Losses, Less than 12 months	(122)	0
Fair Value, 12 Months or More	357	512
Unrealized Losses, 12 Months or More	(223)	(68)
Fair Value	2,267	512
Unrealized Losses	(345)	(68)
Fixed Income Securities [Member]
NOTE H - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Unrealized Gain (Loss) on Investments [Line Items]
Fair Value, Less than 12 months	446	0
Unrealized Losses, Less than 12 months	(36)	0
Fair Value, 12 Months or More	0	0
Unrealized Losses, 12 Months or More	0	0
Fair Value	446	0
Unrealized Losses	(36)	0
Equity Securities [Member]
NOTE H - FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Unrealized Gain (Loss) on Investments [Line Items]
Fair Value, Less than 12 months	1,464	0
Unrealized Losses, Less than 12 months	(86)	0
Fair Value, 12 Months or More	357	512
Unrealized Losses, 12 Months or More	(223)	(68)
Fair Value	1,821	512
Unrealized Losses	$ (309)	$ (68)

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Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.

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